diff --git a/etc/labs/lab18-loopback.conf b/etc/labs/lab18-loopback.conf
index 585949d09..47e260547 100644
--- a/etc/labs/lab18-loopback.conf
+++ b/etc/labs/lab18-loopback.conf
@@ -2,59 +2,59 @@
 # SPDX-License-Identifier: Apache-2.0
 
 nodes = {
-	webrtc_loopback = {
-		type = "webrtc",
+    webrtc_loopback = {
+        type = "webrtc",
 
-		format = "json"
+        format = "json"
 
-		in = {
-			signals = (
-				{ name = "signal", type = "float", unit = "unit" },
-				{ name = "signal", type = "float", unit = "unit" },
-				{ name = "signal", type = "float", unit = "unit" }
-			)
-		}
+        in = {
+            signals = (
+                { name = "signal", type = "float", unit = "unit" },
+                { name = "signal", type = "float", unit = "unit" },
+                { name = "signal", type = "float", unit = "unit" }
+            )
+        }
 
-		out = {
-			signals = (
-				{ name = "signal", type = "float", unit = "unit" },
-				{ name = "signal", type = "float", unit = "unit" },
-				{ name = "signal", type = "float", unit = "unit" }
-			)
-		}
+        out = {
+            signals = (
+                { name = "signal", type = "float", unit = "unit" },
+                { name = "signal", type = "float", unit = "unit" },
+                { name = "signal", type = "float", unit = "unit" }
+            )
+        }
 
-		# A unique session identifier which must be shared between two nodes
-		session = "villas-test"
+        # A unique session identifier which must be shared between two nodes
+        session = "villas-test"
 
-		# Address to the websocket signaling server
-		server = "https://villas.k8s.eonerc.rwth-aachen.de/ws/signaling"
+        # Address to the websocket signaling server
+        server = "https://villas.k8s.eonerc.rwth-aachen.de/ws/signaling"
 
-		# Limit the number of times a channel will retransmit data if not successfully delivered.
-		# This value may be clamped if it exceeds the maximum value supported.
-		max_retransmits = 0
+        # Limit the number of times a channel will retransmit data if not successfully delivered.
+        # This value may be clamped if it exceeds the maximum value supported.
+        max_retransmits = 0
 
-		# Number of seconds to wait for a WebRTC connection before proceeding the start
-		# of VILLASnode. Mainly used for testing
-		wait_seconds = 10 # in seconds
+        # Number of seconds to wait for a WebRTC connection before proceeding the start
+        # of VILLASnode. Mainly used for testing
+        wait_seconds = 10 # in seconds
 
-		# Indicates if data is allowed to be delivered out of order.
-		# The default value of false, does not make guarantees that data will be delivered in order.
-		ordered = false
+        # Indicates if data is allowed to be delivered out of order.
+        # The default value of false, does not make guarantees that data will be delivered in order.
+        ordered = false
 
-		# Setting for Interactive Connectivity Establishment
-    # If empty then configured servers in signaling server are used.
-		ice = {
-		# List of STUN/TURN servers
-		servers = (
-		)
-	  }
-  }
+        # Setting for Interactive Connectivity Establishment
+        # If empty then configured servers in signaling server are used.
+        ice = {
+            # List of STUN/TURN servers
+            servers = ( )
+        }
+    }
 }
-paths = (
-	{
-		in = "webrtc_loopback"
-		out = "webrtc_loopback"
 
-		hooks = ( { type = "print" })
-	}
+paths = (
+    {
+        in = "webrtc_loopback"
+        out = "webrtc_loopback"
+
+        hooks = ( { type = "print" })
+    }
 )
diff --git a/etc/labs/lab18-siggen.conf b/etc/labs/lab18-siggen.conf
index 897bdc4bf..9529f4628 100644
--- a/etc/labs/lab18-siggen.conf
+++ b/etc/labs/lab18-siggen.conf
@@ -2,71 +2,72 @@
 # SPDX-License-Identifier: Apache-2.0
 
 nodes = {
-	webrtc_siggen = {
-		type = "webrtc",
+    webrtc_siggen = {
+        type = "webrtc",
 
-		format = "json"
+        format = "json"
 
-		in = {
-			signals = (
-				{ name = "signal", type = "float", unit = "unit" },
-				{ name = "signal", type = "float", unit = "unit" },
-				{ name = "signal", type = "float", unit = "unit" }
-			)
-		}
+        in = {
+            signals = (
+                { name = "signal", type = "float", unit = "unit" },
+                { name = "signal", type = "float", unit = "unit" },
+                { name = "signal", type = "float", unit = "unit" }
+            )
+        }
 
-		out = {
-			signals = (
-				{ name = "signal", type = "float", unit = "unit" },
-				{ name = "signal", type = "float", unit = "unit" },
-				{ name = "signal", type = "float", unit = "unit" }
-			)
-		}
+        out = {
+            signals = (
+                { name = "signal", type = "float", unit = "unit" },
+                { name = "signal", type = "float", unit = "unit" },
+                { name = "signal", type = "float", unit = "unit" }
+            )
+        }
 
-		# A unique session identifier which must be shared between two nodes
-		session = "villas-test"
+        # A unique session identifier which must be shared between two nodes
+        session = "villas-test"
 
-		# Address to the websocket signaling server
-		server = "https://villas.k8s.eonerc.rwth-aachen.de/ws/signaling"
+        # Address to the websocket signaling server
+        server = "https://villas.k8s.eonerc.rwth-aachen.de/ws/signaling"
 
-		# Limit the number of times a channel will retransmit data if not successfully delivered.
-		# This value may be clamped if it exceeds the maximum value supported.
-		max_retransmits = 0
+        # Limit the number of times a channel will retransmit data if not successfully delivered.
+        # This value may be clamped if it exceeds the maximum value supported.
+        max_retransmits = 0
 
-		# Number of seconds to wait for a WebRTC connection before proceeding the start
-		# of VILLASnode. Mainly used for testing
-		wait_seconds = 10 # in seconds
+        # Number of seconds to wait for a WebRTC connection before proceeding the start
+        # of VILLASnode. Mainly used for testing
+        wait_seconds = 10 # in seconds
 
-		# Indicates if data is allowed to be delivered out of order.
-		# The default value of false, does not make guarantees that data will be delivered in order.
-		ordered = false
+        # Indicates if data is allowed to be delivered out of order.
+        # The default value of false, does not make guarantees that data will be delivered in order.
+        ordered = false
 
-		# Setting for Interactive Connectivity Establishment
-    # If empty then configured servers in signaling server are used.
-		ice = {
-		# List of STUN/TURN servers
-		servers = (
-    )
-	  }
-  }
-	siggen = {
+        # Setting for Interactive Connectivity Establishment
+        # If empty then configured servers in signaling server are used.
+        ice = {
+            # List of STUN/TURN servers
+            servers = ( )
+        }
+    }
+
+    siggen = {
         type = "signal"
         signal = [ "sine", "pulse", "square" ]
-        values = 3,         # Number of values per sample
-        limit = 1,         # Number of samples to generate
-		    rate = 1,           # Rate in Hz
+        values = 3          # Number of values per sample
+        limit = 1           # Number of samples to generate
+        rate = 1            # Rate in Hz
     }
 }
+
 paths = (
-	{
-		in = "siggen"
-		out = "webrtc_siggen"
+    {
+        in = "siggen"
+        out = "webrtc_siggen"
 
-		hooks = ( { type = "print" })
-	},
-	{
-		in = "webrtc_siggen"
+        hooks = ( "print" )
+    },
+    {
+        in = "webrtc_siggen"
 
-		hooks = ( { type = "print" })
-	}
+        hooks = ( "print" )
+    }
 )